Patents by Inventor Stephen K. Powers

Stephen K. Powers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photodynamic therapy of glioma or mammary carcinoma using seleno- or telluropyrylium salts
    Patent number: 5047419
    Abstract: There are disclosed pyrylium salts and a method of using them medicinally in photodynamic therapy for increasing the survival time of animals affected with glioma or mammary carcinoma. The salts are seleno- or telluropyrylium compounds having a singlet oxygen quantum efficiency of at least 0.005 when exposed as described at wavelengths between about 650 and 1000 nanometers.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: September 10, 1991
    Assignee: Eastman Kodak Company
    Inventors: Michael R. Detty, Stephen K. Powers